2143400 has 48 divisors (see below), whose sum is σ = 5699040. Its totient is φ = 734400.

The previous prime is 2143391. The next prime is 2143417. The reversal of 2143400 is 43412.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 635 + ... + 2165.

It is an arithmetic number, because the mean of its divisors is an integer number (118730).

2^2143400 is an apocalyptic number.

2143400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2143400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2849520).

2143400 is an abundant number, since it is smaller than the sum of its proper divisors (3555640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2143400 is a wasteful number, since it uses less digits than its factorization.

2143400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554 (or 1545 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2143400 is about 1464.0355186948. The cubic root of 2143400 is about 128.9340848676.

Adding to 2143400 its reverse (43412), we get a palindrome (2186812).

The spelling of 2143400 in words is "two million, one hundred forty-three thousand, four hundred".